Slaty-backed Gull (schistisagus) / オオセグロカモメ / 큰재갈매기

(last update: December 2015)

Slaty-backed Gull (schistisagus) 3rd cycle (4CY), March 12 2012, Choshi, Japan. Picture: Peter Adriaens.

Please also visit Peter's Pbase account and his Picasaweb albums for many more pictures!

3rd cycle with still black in the tail, and brown crescents on the underwing coverts, obvious black on the bill and extensive winter streaking, also on belly. Outerweb of P10 entirely dark up to the primary coverts, and darker than inner web.